Effect of chemical reaction on heat and mass transfer by mixed convection flow about a sphere in a saturated porous media

A.M. Rashad; A.J. Chamkha; S.M.M. El-Kabeir

doi:10.1108/09615531111123092

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International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Online from: 1991

Subject Area: Mechanical & Materials Engineering

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Effect of chemical reaction on heat and mass transfer by mixed convection flow about a sphere in a saturated porous media

Document Information:
Title:	Effect of chemical reaction on heat and mass transfer by mixed convection flow about a sphere in a saturated porous media
Author(s):	A.M. Rashad, (Department of Mathematics, Faculty of Science, South Valley University, Aswan, Egypt), A.J. Chamkha, (Manufacturing Engineering Department, The Public Authority for Applied Education and Training, Shuweikh, Kuwait), S.M.M. El-Kabeir, (Department of Mathematics, Faculty of Science, South Valley University, Aswan, Egypt Department of Mathematics, College of Science, Al-Kharj University, Al-Kharj, Saudi Arabia)
Citation:	A.M. Rashad, A.J. Chamkha, S.M.M. El-Kabeir, (2011) "Effect of chemical reaction on heat and mass transfer by mixed convection flow about a sphere in a saturated porous media", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 21 Iss: 4, pp.418 - 433
Keywords:	Chemical reactions, Convection, Heat transfer, Mass transfer, Porous materials
Article type:	Research paper
DOI:	10.1108/09615531111123092 (Permanent URL)
Publisher:	Emerald Group Publishing Limited
Abstract:	Purpose – The purpose of this paper is to study the effects of chemical reaction on mixed convection flow along a sphere in non-Darcian porous media. Design/methodology/approach – The sphere surface is maintained at uniform temperature and species concentration for both cases of heated (assisting flow) and cooled (opposing flow) sphere. An appropriate transformation is employed and the transformed equations are solved numerically using an efficient implicit iterative tri-diagonal finite difference method. Findings – It is found that chemical reactions have significant effect on heat and mass transfer. Comparisons with previously published work are performed and the results are found to be in excellent agreement. Originality/value – The paper is original and describes how a parametric study of the physical parameters was conducted and illustrates graphically a representative set of numerical results for the velocity, temperature, and concentration profiles, as well as the local skin-friction coefficient, local wall temperature, and local wall concentration, to show interesting features of the solutions.